Crabapple: Aphids categories: Crabapple Crabapple Insects Ornamental trees Ornamentals revision date: 2024-04-08 11:46 Aphid colony on leafPhoto by: A.L. Antonelli Biology Aphids on crabapples may be green or reddish in color. They typically feed near the tip of growing shoots, sometimes deforming leaves and stunting terminal growth. Fruit may also be deformed. These soft-bodied insects […]
Crabapple: Apple-and-thorn skeletonizer categories: Crabapple Crabapple Insects Ornamental trees Ornamentals revision date: 2023-12-02 09:17 Apple-and-thorn skeletonizer caterpillar feeding on leafPhoto by: A.L. Antonelli Biology The adult of the apple-and-thorn skeletonizer is a small dark-brown moth. It overwinters as a pupa or an adult, with the females laying eggs in the spring. The caterpillars are yellow-green […]
Crabapple: Leafrollers and leaftiers categories: Crabapple Crabapple Insects Ornamental trees Ornamentals revision date: 2024-04-08 11:46 Rhododendron leafroller leaf damagePhoto by: Unknown Biology Several species of caterpillars will roll and tie leaves of fruit trees. Characteristic signs of feeding include leaves that are webbed, rolled, and tied, often with frass in the webbing. Damaged leaves often […]
Crabapple: San Jose scale categories: Crabapple Crabapple Insects Ornamental trees Ornamentals revision date: 2024-04-08 11:46 San Jose scale closeupPhoto by: K. Grey Biology San Jose scale is an armored (hard) scale found on many deciduous trees and shrubs including (but not limited to) apple, cherry, elm, maple, poplar, and willow. The scale insects are about […]
Crabapple: Powdery mildew categories: Crabapple Crabapple Diseases Ornamental trees Ornamentals revision date: 2022-11-21 03:55 Powdery mildew on apple leavesPhoto by: R.S. Byther Biology Powdery mildew of crabapple is typically seen on the foliage, but may also occur on twigs, blossoms, and fruit. Characteristic patches of white, powdery fungus develop on the leaves and terminal shoots. […]
Crabapple: Scab categories: Crabapple Crabapple Diseases Ornamental trees Ornamentals revision date: 2022-11-21 03:46 Apple scab on leaves and young fruitPhoto by: R.S. Byther Biology Scab of crabapples is caused by the same fungus which causes scab on apple and hawthorn. The disease infects during wet weather in the spring and initially causes small, pale, watersoaked […]
Crabapple: Spider mites categories: Crabapple Crabapple Insects Ornamental trees Ornamentals revision date: 2024-04-08 11:46 Spider mites under microscopePhoto by: L.K. Tanigoshi Biology Spider mites on crabapple vary in color. They may be yellow, green, red or brown. They have eight legs and are very small, appearing as moving dots when viewed through a hand lens. […]
Crabapple: Stem rot categories: Crabapple Crabapple Diseases Ornamental trees Ornamentals revision date: 2022-11-21 02:02 Crabapple stem rot: rotten stem has a dark blotchPhoto by: R.P. Regan Biology Stem rot of crabapple is caused by a soil-borne fungus. This disease is most prevalent in the winter on nursery stock. The fungus infects through wounds on the […]